scholarly journals The Relationship Between the Cutting Process Parameters and the Surface Roughness during the Aluminum Machining

2020 ◽  
Vol 877 ◽  
pp. 012001
Author(s):  
A B Pop ◽  
M A Țîțu
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Cutting Process ◽  
The Relationship

scholarly journals FEM-Based Study of Precision Hard Turning of Stainless Steel 316L

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2522 ◽  
Author(s):  
Ahmed Elkaseer ◽  
Ali Abdelaziz ◽  
Mohammed Saber ◽  
Ahmed Nassef
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Process Parameters ◽  
Chip Formation ◽  
Feed Rate ◽  
Cutting Conditions ◽  
Cutting Process ◽  
Surface Generation ◽  
Stainless Steel 316L ◽  
Edge Radius

This study aims to investigate chip formation and surface generation during the precision turning of stainless steel 316L samples. A Finite Element Method (FEM) was used to simulate the chipping process of the stainless steel but with only a restricted number of process parameters. A set of turning tests was carried out using tungsten carbide tools under similar cutting conditions to validate the results obtained from the FEM for the chipping process and at the same time to experimentally examine the generated surface roughness. These results helped in the analysis and understanding the chip formation process and the surface generation phenomena during the cutting process, especially on micro scale. Good agreement between experiments and FEM results was found, which confirmed that the cutting process was accurately simulated by the FEM and allowed the identification of the optimum process parameters to ensure high performance. Results obtained from the simulation revealed that, an applied feed equals to 0.75 of edge radius of new cutting tool is the optimal cutting conditions for stainless steel 316L. Moreover, the experimental results demonstrated that in contrast to conventional turning processes, a nonlinear relationship was found between the feed rate and obtainable surface roughness, with a minimum surface roughness obtained when the feed rate laid between 0.75 and 1.25 times the original cutting edge radius, for new and worn tools, respectively.

Influence of Process Parameters on Surface Roughness and Wettability of Aluminum-Matrix Materials

2018 ◽  
Vol 932 ◽  
pp. 8-12 ◽  
Author(s):  
Wei Xiao Du ◽  
Li Zhan ◽  
Feng Liu ◽  
Bao Zhen Shan ◽  
W. Hwang
Keyword(s):  
Surface Roughness ◽  
Hydrochloric Acid ◽  
Process Parameters ◽  
Aluminum Matrix ◽  
Hydrophobic Surface ◽  
Etching Time ◽  
Influence Of Process Parameters ◽  
Macro Scale ◽  
The Hierarchical Structure ◽  
The Relationship

Super hydrophobic surface has a good application prospect in industry, agriculture and daily life. By controlling the concentration and etching time of hydrochloric acid, different rough structures were prepared on the aluminum-matrix surface, and the relationship of roughness & CA were established to explore the influence of process parameters on the surface roughness and surface wettability. It is found that the concentration and time of hydrochloric acid significantly affect the surface roughness and contact angle (CA). When the concentration of hydrochloric acid is 1.5mol/L and the etching time is 90s, the surface roughness is the best and the maximum CA is obtained. After sodium hydroxide treatment, the hierarchical structure with micro and macro scale was formed, which significantly reduced the contact area between the water droplet and the surface, and the maximum roughness and CA was achieved. The relationship between surface roughness and CA shows that the roughness can amplify the hydrophile/hydrophobicity. Therefore, a better surface of superhydrophobic surface can be obtained by increasing the surface roughness.

Research of Changeability of Cutting Process Parameters at Turning of the Shaped Surfaces

2014 ◽  
Vol 1036 ◽  
pp. 361-364
Author(s):  
Tatiana Ivchenko ◽  
Irina Petryaeva ◽  
Roman Grubka
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
Cutting Forces ◽  
Cutting Temperature ◽  
Cutting Speed ◽  
Cutting Process ◽  
Geometrical Parameters ◽  
Edge Angle ◽  
Cutting Regimes

Conformities to law of changeability of the tool geometrical parameters, parameters of сut section, parameter of the chip formation, cutting forces, cutting temperature and machining surface roughness at machining of the shaped surfaces are set. There is researched character of change of the working edge angle, cutting face edge angle, width and thickness of cut section, cutting speed on position of blade top on the convex and concave shaped surface. The analytical dependences of the chip contraction coefficient, cutting forces, cutting temperature and machining surface roughness on the cutting speed and feed are certain. The method of determination of the cutting forces, thermal streams and cutting temperature at turning of the shaped surfaces is created taking into account changeability of the geometrical parameters and parameters of сut section. There are set coefficients, which allow expecting these parameters in any point of the convex and concave shaped surfaces. The method of account of the cutting process parameters changeability at optimization of the cutting regimes at turning of the shaped surfaces on the criterion of maximum productivity is developed. With the use of method of the linear programming analytical dependences of the optimum-cutting regime from the turning parameters taking into account variable limitations on cutting forces, cutting temperature and machining surface roughness are definite.

Optimization of surface roughness in ball-end milling using teaching-learning-based optimization and response surface methodology

2016 ◽  
Vol 231 (14) ◽  
pp. 2596-2607 ◽  
Author(s):  
Mithilesh K Dikshit ◽  
Asit B Puri ◽  
Atanu Maity
Keyword(s):  
Surface Roughness ◽  
Process Parameters ◽  
End Milling ◽  
Cutting Speed ◽  
Cutting Process ◽  
Depth Of Cut ◽  
Radial Depth ◽  
Teaching Learning Based Optimization ◽  
Teaching Learning ◽  
Axial Depth

Surface roughness is one of the most important requirements of the finished products in machining process. The determination of optimal cutting parameters is very important to minimize the surface roughness of a product. This article describes the development process of a surface roughness model in high-speed ball-end milling using response surface methodology based on design of experiment. Composite desirability function and teaching-learning-based optimization algorithm have been used for determining optimal cutting process parameters. The experiments have been planned and conducted using rotatable central composite design under dry condition. Mathematical model for surface roughness has been developed in terms of cutting speed, feed per tooth, axial depth of cut and radial depth of cut as the cutting process parameters. Analysis of variance has been performed for analysing the effect of cutting parameters on surface roughness. A second-order full quadratic model is used for mathematical modelling. The analysis of the results shows that the developed model is adequate enough and good to be accepted. Analysis of variance for the individual terms revealed that surface roughness is mostly affected by the cutting speed with a percentage contribution of 47.18% followed by axial depth of cut by 10.83%. The optimum values of cutting process parameters obtained through teaching-learning-based optimization are feed per tooth ( fz) = 0.06 mm, axial depth of cut ( Ap) = 0.74 mm, cutting speed ( Vc) = 145.8 m/min, and radial depth of cut ( Ae) = 0.38 mm. The optimum value of surface roughness at the optimum parametric setting is 1.11 µm and has been validated by confirmation experiments.

Possible examinations of stone machining focused on the relationship between technological parameters and surface quality

2013 ◽  
Vol 4 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Zs. Kun ◽  
I. G. Gyurika
Keyword(s):  
Surface Roughness ◽  
Metal Cutting ◽  
Cutting Speed ◽  
Theoretical Background ◽  
Motion Path ◽  
Depth Of Cut ◽  
Manufacturing Cost ◽  
Technological Parameters ◽  
The Relationship ◽  
Manufacturing Time

Abstract The stone products with different sizes, geometries and materials — like machine tool's bench, measuring machine's board or sculptures, floor tiles — can be produced automatically while the manufacturing engineer uses objective function similar to metal cutting. This function can minimise the manufacturing time or the manufacturing cost, in other cases it can maximise of the tool's life. To use several functions, manufacturing engineers need an overall theoretical background knowledge, which can give useful information about the choosing of technological parameters (e.g. feed rate, depth of cut, or cutting speed), the choosing of applicable tools or especially the choosing of the optimum motion path. A similarly important customer's requirement is the appropriate surface roughness of the machined (cut, sawn or milled) stone product. This paper's first part is about a five-month-long literature review, which summarizes in short the studies (researches and results) considered the most important by the authors. These works are about the investigation of the surface roughness of stone products in stone machining. In the second part of this paper the authors try to determine research possibilities and trends, which can help to specify the relation between the surface roughness and technological parameters. Most of the suggestions of this paper are about stone milling, which is the least investigated machining method in the world.

scholarly journals On the Relevance of Volumetric Energy Density in the Investigation of Inconel 718 Laser Powder Bed Fusion

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 538 ◽  
Author(s):  
Fabrizia Caiazzo ◽  
Vittorio Alfieri ◽  
Giuseppe Casalino
Keyword(s):  
Surface Roughness ◽  
Energy Density ◽  
Process Parameters ◽  
Vickers Hardness ◽  
Powder Bed Fusion ◽  
Processing Conditions ◽  
Laser Powder Bed Fusion ◽  
Powder Bed ◽  
Fractional Density ◽  
Experimental Variation

Laser powder bed fusion (LPBF) can fabricate products with tailored mechanical and surface properties. In fact, surface texture, roughness, pore size, the resulting fractional density, and microhardness highly depend on the processing conditions, which are very difficult to deal with. Therefore, this paper aims at investigating the relevance of the volumetric energy density (VED) that is a concise index of some governing factors with a potential operational use. This paper proves the fact that the observed experimental variation in the surface roughness, number and size of pores, the fractional density, and Vickers hardness can be explained in terms of VED that can help the investigator in dealing with several process parameters at once.

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